Drilling apparatus



July 21, 1936. H. c. JOHANSEN 2,048,072

DRILLING APPARATUS Filed Aug. 20, 1951 6 Sheets-Sheet 1 g arry Jo/mmien. 4' Mn w.-

H. C. JOHANSEN DRILLING APPARATUS July 21, 1936.

Filed Aug. 20, 1931 6 Sheets-Sheet 2 GEE/acumen.

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DRILLING APPARATUS Filed Aug. 20, 1931 6 Sheets-Sheet :s

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DRILLING APPARATUS Filed Aug. 20, 1951 6 Sheets-Sheet 4 fave Zo r. Harry 627056112118 1 y 106 ,4; 4mm

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July 21, 1936. c. JOHANSEN 2,048,072

DRILLING APPARATUS Filed Aug. 20, 1931 6 Sheets-Sheet-5 14- may. Qzq

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DRILLING APPARATUS Filed Afig. 20, 1931 6 Sheets-Sheet 6 r u 444 mm azzjl.

Patented July 21, 1936 PATENT OFFICE panama APPARATUS Harry G. Johansen, Michigan City, ImL, assignor to Sullivan Machinery Company, a corporation of Massachusetts Application August 20, '1931, Serial No. 558,269

60 Claims. (01. 25551) This invention relates to drilling apparatus and more particularly to an improved drilling apparatus of the self-contained, portable type especially adapted for use in boring the overburden for coal or similar materials.

An object of this invention is to provide an improved drilling apparatus. Another object is to provide an improved drilling apparatus especially adapted for use in boring the overburden for coal or similar materials. A further object is to provide an improved drilling apparatus having improved adjustable supporting means for the boring tool whereby the latter may be positioned to drill holes at any desired angle, to drill a horizontal hole close to the ground and to drill in various other positions. Yet another object is to provide an improved drilling apparatus having improved feeding and rotating mechanisms, an improved hoisting mechanism and improved means for driving and operating the said mechanisms. Still another object is to provide an improved propelling means for an apparatus of the above character. A further object is to provide an improved chuck for use with such an apparatus. These and other objects and advantages of the invention will, however, hereinafter more fully appear.

. In the accompanying drawings there is shown for purposes of illustration one form which the invention may assume in practice.

In these drawings,

Fig. 1 is a side elevational view of the illustrative embodiment of the improved drilling apparatus.

Fig. 2 is a front end elevational view of the apparatus shown in Fig. 1.

Fig. 3 is a longitudinally extending vertical sectional view taken substantially on line 3-3 of Fig. 2 and illustrating the feeding and rotation mechanisms and the hoisting mechanism, together with the driving means therefor.

Fig. 4 is a horizontal sectional view taken substantially on line 4-4 of Fig. 3.

Fig. 5 is a vertical sectional view taken substantially on line 55 of Fig. 1 and illustrating the feeding and rotation mechanisms.

Fig. 6 is a transverse vertical sectional view taken substantially on line 66 of Fig. 1 and illustrating a portion of the apparatus in end elevation.

Fig. '7 is a detail sectional view taken substantially on line 1-1 of Fig. 6.

Fig. 8 is a horizontal sectional view taken substantially on line 8-8 of Fig. 1 and illustrating the propelling means for the apparatus.

Fig. 9 is a transverse vertical sectional view taken substantially on line 9-9 of Fig. 8.

Fig. 10 is a transverse vertical sectional view taken substantially on line I0Ill of Fig. 8.

Fig. 11 is a detail sectional view taken on line Illl of Fig. 3.

In this illustrative embodiment of the invention there 'is shown a drilling apparatus of the selfpropelled, tractor tread supported and guided type generally comprising a drill rotation mechanism I, drill feeding mechanism 2, drill hoisting mechanism 3, a fluid compressor 4 and a motor 5 for driving the various units of the apparatus. The main frame 6 of the apparatus is supported by endless traction treads I, 1 arranged at opposite sides of the frame and between which the frame is mounted. The tractor tread supporting frames 8 are pivotally mounted'at 9 at their forward ends to swing in a vertical direction relative to the main frame and are connected at their rearward ends by a transverse equalizer bar I0 pivotally connected between its ends at l I to the rear end of the main frame and at its ends to the tread frames 8, thereby providing a threepoint suspension for the main frame and enabling the machine to travel over uneven surfaces and obstructions. The motor 5 is suspended within the main frame and is arranged with its power shaft l2 horizontally and longitudinally disposed,

- as shown.

The fluid compressor 4 is herein of the angle advance of the compressor as shown in Fig. 1. The compressor driving means comprises a sprocket Iijournaled on the rearwardly projecting end of the motor shaft l2 and connectible to the motor shaft by a usual jaw clutch H. The sprocket I6 is connected by a multiple chain connection l8 to a sprocket l9 suitably fixed to the compressor crank shaft 20. The jaw clutch I1 is operated by a pivoted shipper lever 2|, as shown in Fig. 1. The cylinders I3, l3 of the compressor are provided with usual water jackets supplied with cooling water from a radiator 22 mounted at the rear of the apparatus. The sprocket l9 secured to the compressor crank shaft has rotatable therewith and driven thereby a pulley 23 connected by an endless belt 24 to a fan pulley 25, and this atter pulley drives a pump shaft 26 of a pump 21 which circulates cooling fluid from the 35 herein arranged transversely of the apparatus in A inder water jackets. The cooling fluid is conducted from the cylinder water jackets to the upper end of the radiator through pipe connections 29. As is usual in compressors of the type disclosed, the load on the compressor is controlled by the receiver pressure through a usual pilot valve and inlet valve unloading mechanism, but as such accessories are well known to those skilled in theart, description and illustration of the same are thought unnecessary.

Now referring to the improved driving connec tions for the drill rotation mechanism I, it will be noted that keyed to the rear end of the motor power shaft adjacent the sprocket I6 is a chain sprocket 38 connected by an endless chain 3| to a sprocket 32 keyed to the rear end of a countershaft 33 herein arranged parallel with the motor shaft and extending alongside and suitably journaled on the main frame. Keyed to the forward end of this counter-shaft is a chain sprocket 34 connected by an endless chain 35 to a sprocket 36 keyed to the rear end of a longitudinal drive shaft 31. This shaft is suitably journaled on the machine frame in the manner shown in Fig. 3 and is connectible by a multiple disc clutch 38 to analined shaft 39 of achange speed or selective gear shift mechanism 48. The operating means for the clutch 38 comprises a clutch applying member 4| 'slidably mounted on the shaft 31 and operating through pivoted fingers 42 a pressure plate 43 acting on the clutch discs. Connected to the member 4| is a shipper yoke 44 having a pivoted operating lever 45. As illustrated, the shaft 39 of the change speed mechanism 48 has splined thereto at 46 a sleeve 41 having integrally connected therewith gears 48 and 49 of different size. Arranged parallel with the shaft 39 and suitably joumaled within the drill base 58 is a shaft 5| having keyed thereto gears 52 and 53 of different size and with which the gears 48, 49 are adapted selectively to 'mesh. With the gears 48, 52 are in mesh, the shaft 5| is driven at a relatively high speed, and when the gears 49, 53 are in mesh the shaft 5| is driven at a relatively slow speed. The

shiftable change speed gears 48, 49 are operated by a shipper yoke 54 fixed to a slidable operating rod 55 actuatable through a rack and pinion 55 by a lever 51. As shown in Fig. 3, the shaft 5| is arranged with its axis allned with a frame 58 attached to the drill base and on which is mounted for swinging movement about the axis of shaft 5| a radial arm or extension frame 59. Mounted on the outer end of the arm 59 for swinging movement about an axis parallel with the arm axis is a swivel head 68. Fixed to the forward end of the shaft 5| is a chain sprocket 6| connected by a multiple chain connection 62 housed in the arm 59 to a chain sprocket 63 keyed to a shaft 84 arranged with its axis coincident with the swivel head axis.

Keyed to the forward end of the shaft 64 is a'bevel gear 65 meshing with a bevel gear 66 keyed to a rotation sleeve 61 suitably joumaled on the swivel head frame 68. Extending centrally through and splined at 69 to the rotationsleeve 61 is a hollow drive rod 18. Extending centrally through the hollow drive rod and connectible to the drive rod for rotation therewith by'a chuck generally designated H is a usual drill stem-'12. It will thus be seen that the drill stem may be rotated by the motor 5 at a plurality of speeds.

The mechanism for swinging the arm or extension frame 59 and for swivellymbunting the swivelhead 68 on theouter extremity of the arm will now be described. Herein formed integral with; the frame 58 is a-wormwheel 18 with tion 98;

which meshes a worm 14 keyed to a transverse shaft 15 suitably journaled within brackets 16 attached to the arm 59. The ends of the shaft 15 are squared for the reception of a suitable turning instrument,-herein a detachable handle 11 shown in Fig. 1. It will thus be seen that the arm 59 may be swung about the axis of the shaft 6| into any desired angular position, and is automatically locked in such position by the self-locking teeth of the worm gearing 13, 14. The outer extremity of the arm 59 is provided with an annular flange 18 having a cylindrical projection 19 presenting an annular bearing surface on which is rotatably mounted a swivel frame 88.- The frame 88 is annularly grooved at 8| to receive the heads of holding bolts 82. Pivotally mounted at 83 on lateral lugs formed integral with the swivel frame 88 is the swivel head 68, the swivel head being swingable about its hinged connection with the swivel frame outwardly into the position indicated in dotted lines in Fig. 4, for purposes well understood to those skilled in the art. The swivel frame is held in its operative position, with the bevel gears 65, 68 maintained in meshing engagement, by a bolt 84 pivoted at 85 on the swivel head frame and engageable with a slot 86 formed in the lateral edge of the frame 88. The bolt 84 is provided with a usual tightening nut 81. It will thus be seen that when the holding bolts 82 are loosened,

the swivel head may be swung into any desired angular position about the axis of the shaft 64, and may be secured in any of its adjusted positions by suitable tightening these holding bolts.

Now referring to the drill feeding means 2, it will be observed that mounted on the swivel head frame 68 are parallel feed cylinders 88, 88 containing reciprocable feed pistons 89, 89. These feed pistons are provided with parallel piston rods 98, 98 rigidly connected at 9| to a. thrust head frame 92. This frame carries a usual thrust bearing 93 for receiving the axial thrust of the drive rod. Pressure fluid maybe supplied to the opposite ends of the feed cylinders through pipe connections 94 controlled by usual valves 95, 95, and fluid underpressure is supplied to these pipe connections under the control or a throttle valve 96 through a hose 91 connected to the receiver I5 through a valve controlled connec- It will thus be seen that upon suitable manipulation of the control valves, the drive rod may be fed upwardly and downwardly, as desired. Carried at the upper end of the drill stem 12 is a usual fluid swivel 99 connected, through a hose connection I88 controlled by a valve II, to the receiver I5. It will thus be seen that pressure fluid maybe supplied from the compressor receiver through the hose'connections above described to operate the feeding mechanism and to supply cleansing fluid through the drill stem to the boring tool I82 carried at the lower end of the drill'stem, thereby to blow-out the cuttings from the' bott om of the sition is a member I88 threadedly connected 75 at I09 to the chuck casing and held in its different adjusted positions by a spring pressed plunger lock I09. The member I08 engages plunger rods IIO slidably guided in the chuck casing and engaging at III the chuck jaws. It will thus be seen that when the drive rod is fed relative to the drill stem the chuck jaws I grip automatically the drill stem, and when the drive rod is fed in the opposite direction, the

chuck jaws automatically release. The screws I06 may be adjusted to move the chuck jaws into a position to grip positively the drill stem so that the drill stem may be fed in either direction without release of the jaws.

The hoisting mechanism 3 comprises a hoisting drum II2 arranged on a longitudinal axis and having wound thereon, as shown in Fig. 1, a usual hoisting cable II3. This cable II3 extends upwardly from the hoisting drum around a top pulley H4, and the drop line of this cable carries a swivel hook H5 connectible to the fluid swivel 99 of the cleansing fluid supply connection. The top pulley is supported on the main frame by standards II6, braced by brace rods H1 in the usual manner. The means for driving the hoisting drum comprises a spur gear II8 splined to'the shaft 5I, as shown in Fig. 3, and the means for sliding the gear H8 comprises a pivoted shipper yoke II8 operated by a lever I20. The gear H8 is adapted to mesh with an idler 'gear I 2I journaled on a shaft I22 suitably supported by a hoist frame I23 and the gear I2I meshes with a spur gear I24 keyed to the drum shaft I25. Also keyed to the shaft I25 is a spur gear I26 meshing with a spur gear I21. Rotatable with and driven by the gear I21 is a spur gear I28 which meshes with a gear I29. The gear I29 meshes with an internal gear I30 secured to a rotatable reaction member I3I controlled by a brake band I32. The hoisting drum is provided with a usual brake band I33. It will thus be seen that when the gear H8 is in meshing engagement with the gear HI and the reaction member I3I is held stationary by the brake band I32, the hoisting drum I I2 is driven through the gears I24, I26, I21, I28, and I29, the last of which meshes with and rolls around as on a trackway, the internal gear I38. When the brake band I32 is released and the brake band I33 is applied, the hoisting drum H2 is held stationary.

The mechanism driven by the motor 5 for driving the endless traction treads 1, 1 for propelling and guiding the apparatus is substantially the same in structure and operation as that described and claimed in the patent to Frank A.

v Halleck, No. 1,771,625, patented July 29, 1930.

This drive mechanism comprises a spur gear I35 fixed to theforward end of the motor shaft I2 and meshing with a spur gear I 36 connected to a. longitudinal shaft I31. Connectible to the shaft I31 by a multiple disc clutch I38 is a spur gear I39 meshing with spur gears I40, I4I. Meshing with the spur gear MI is a spur gear I 42; and the gear I4I has a greater number of teeth than either of the gears I40, I42, which have the same number of teeth, the purpose of which will be hereinafter fully described. The gears I40, I4I, I42 are connectible by multiple disc clutches I43, I44, I45 respectively to longitudinal shafts I46, I41 and I48. Coaxial with the shafts I46, I41 and I48 and driven by the gears I40, MI and I42 are worms I49, I50 and I5I. The shafts I46, I41 and I48 are adapted to be held against rotation by brake frictions I52, I53 and I54 respectively. The worms I49, I50 and I5I mesh respectively with worm wheels I55, I56 and I51 which are adapted to drive, through differentials cludes coaxial bevel gears I63, I64 with which mesh planet gears I65 carried by a spider member I66 keyed to the alined shaft I6I or I62. The clutch and brakes for each worm are operated by an applying member I61 slidably mounted on the worm shaft and operated by a shipper member I68. The applying member is provided with cam surfaces I69 which are engageable with levers I 10; and when the member is shifted in one direction the clutch is applied and the brake released, and when shifted in the opposite direction the brake is applied and the clutch released. As shown in Fig. 9, the shipper members I68 are actuated by rods I1I, I12 and I13 respectively; and these rods are operated through cranks, links and pull rods by control levers I14 and I15 pivotally mounted on the side of the machine frame, as shown in Fig. 1. As the operating means for the worm clutches and brakes are clearly described in the above mentioned patent, further description of the same herein is thought unnecessary other than to state that the brakes and clutches for each worm are independently controllable to effect drive of the worms separately or simultaneously. It is to be noted that the worms I49, I50 and I5I have the same pitch, but that the worms I49 and I5I on the shafts I46 and I 48 are right and left hand respectively. The worm wheel I 56 is driven in a direction opposite to that in which the worm wheels I55 and I 51 are driven. due to the fact that one side of the gear I39 meshes with the gear I40, while the other side meshes with the gear I4I, thus driving gears I40 and MI in the same direction, while gear I42 will rotate in a direction opposite to the gear I40, but the worm wheels driven thereby will rotate in the same direction due to the right and. left hand worms I49 and I5I.

If it is desired to feed the apparatus forwardly at a relatively fast speed, the brakes on shafts I46 and I48 are released'and the clutches I43, I45 are applied, connecting the worms I 49, I5I and their respective shafts I 46, I48 to the gears I40 and I42 respectively. During such operation, the brake on shaft I 41 is applied and the clutch I44 released; thus the worm I50 on shaft I41 is held against rotation and consequently rotation of the worm wheel I56 is prevented. The worm wheel I56 in turn prevents rotation of the inner bevel gears of the differentials; and inasmuch as the shafts I46 and I48 are now oppositely driven, due to the clutch engagement, worm wheels I55 and I51 are driven by the worms I49 and I5I respectively to cause rotation of the planetary bevel pinions orbitally around the stationary bevel gears which then act as reaction gears. The spider members of the differentials will thereby be oppositely carried around by the planet gears to cause a positive rotation of the alined shafts I6I, I62. If, however, it should be desired to turn the apparatus in one direction or the other, one of the shafts I46 or I48 would be held stationary while the other reverse shaft I41 is also being held, this allowing movement of only and the reverse mechanism actuated by applying the clutch I44 mounted on the shaft I41 and releasing the shaft brake to drive positively the shaft I41, which in turn will drive the worm wheel I56 in a reverse direction to drive the planet gears in a reverse direction around the outer bevel gears of the differential,' which are now held stationary by the held or stationary shafts I46 and I48. If it is desired to propel the apparatus at a relatively slow speed, all the brakes on shafts I46, I41 and I48 are released and the clutches therefor are simultaneously applied, connecting the worms 449, I58 and I 5| and their shafts I46, I41 and I48 to the gears I48, I and I42 respectively for rotation therewith. This, it will be seen, simultaneously operates both the fast reverse and fast forward feed mechanisms, and due to the differential action between the same a slow forward speed is obtained, the slow forward feed being obtained due to the fact that the gear I 4| has a greater number of teeth than either the gear I48 or gear I42 so that the worm wheel I55 has a slightly smaller angular velocity than do the wheels I55 and I51. The smaller angular velocity of the gear MI, and consequently of the worm I58 and worm wheel I56 in the reverse feed, is due to the fact that the ratio'of the gear I4I to the motor driving pinion I35 is greater than the ratio of the gears I48 and I42 to said motor driving pinion. Thus, during the slow forward movement, the worm wheel I56 drives the planet gears of the differential oppositely and at a slower speed than do the worm wheels I55 and I51, the result being that the spider members of the differentials will take a slow forward speed equal to the difference be tween the speed of the respective bevel gears meshing with the bevel planet gears, and thus will drive the alined shafts I6I,. I62 at a slow forward speed. It is therefore obvious that the slow forward speed is obtained by the simultaneous operation of a fast reverse and fast forward feeds. As the operation of the propelling means for the apparatus is clearly described in the above mentioned Halleck patent, a further description thereof is herein unnecessary.

In the use of the improved apparatus, it will be noted that when the clutch I1 is connected, the

compressor 4 may be driven by the motor 5 through the chain and sprocket connections I6, I8 and I9 connected to the compressor crank shaft 28. The compressor discharges fluid through pipe connections I4 to the receiver I5, from which fluid is supplied through hose connection 91 to the drill feeding mechanism and through hose connection I88 to the hole cleansing means. When the multiple disc clutch 38 is applied and the shiftable gears 48, 49 of the change speed mechanism are suitably connected to gears 52 or 53, the drill rotation mechanism may be driven by the motor 5 through the chain and sprocket connection 38, 3I, 32, counter-shaft 33, chain and sprocket connection 34, 35, 36, shaft 31, the change speed gearing, shaft 5|, chain and sprocket connection 6|, 62, 63 and bevel gearing 65, 66. By suitably connecting the gear H8 in meshing engagement with the gear I2I and applying the brake band I32, the hoisting drum II2 may be driven through the'change speed mechanism at a plurality ofspeeds. The swivel head 68 of the drill may be adjusted into any desired angular position on the outer extremity of the arm 59 by suitably loosening the bolts 82 and turning the swivel head in its bearing, the bolts thereafter being tightened to hold the swivel head in position. The arm 59 may be swung into any desired position about its axis by simply turning the worm gears I3, I4. The chuck II may be operated by suitably, manipulating the control elements I86 and I88. During the drilling operation, the hoist- 5 ing cable I I3 is extended upwardly from the hoisting drum around the top pulley H4, and the drop line of the cable is connected by the hook II5 to the fluid swivel 99, thereby enabling the drill stem I2 to be raised, lowered or held suspended, as de- 18 sired. The drill rotation mechanism is then connected to the motor and the drive rod I8 is ro tated. Pressure fluid is supplied from the receiver I5 to the feed cylinders 88, 88 under the control of the valves 95, 96, thereby moving the 15 feed pistons 89, 88 downwardly. As the feed pistons move downwardly, the chuck jaws I of the chuck 1| grip automatically the drill stem, thereby connecting the drill stem to the drive rod and feeding mechanism, and as a result, as the drill 20 stem is fed downwardly, it is rapidly rotated. During the drilling operation pressure fluid is supplied from the receiver I5 through the hose connection I88, fluid swivel 99 and the hollow drill stem to the boring tool I82 to cleanse the cuttings 23 from the latter. When pressure fluid is supplied to the opposite ends of the feed cylinders, the driving rod and chuck are fed forwardly, and as a result, the chuck jaws I85 are released automatlcally from their gripping engagement with the 30 drill stem. If it is desired to effect feed of the drill stem positively in either direction, the chuck jaws I85 are moved into positive gripping engagement with the drill stem by suitable adjustment of the screws I86, and the chuck jaws may be held 35 entirely released by suitable adjustment of the member I88. The machine may be propelled either forwardly or rearwardly at a relatively high speed or forwardly at a relatively slow speed, as desired, through the differential connections 40 driven by the motor 5. It will be noted that by suitable adjustment of the swivel head and swingable arm 59, the drill may be operated to drill holes in any desired angular position, in horizontal positions adjacent the ground, in parallel ver- 45 tical positions at either side of the apparatus, or any desired intermediate positions, thereby enabling the drill to be readily adjusted to accommodate itself to varying drilling conditions.

As a result of this invention, it will be noted 50 that an improved drilling apparatus is provided which is entirely self-contained, the various mechanisms of the machine being mounted on a portable base of the self-propelled type and driven from the power unit on the base. It will further 55 be noted that the motor 5 drives the various units of the apparatus, and that the fluid compressor 4 supplies fluid to both the feeding means and hole cleansing means. It will further be noted that the various mechanisms of the machine are 88 I arranged in an improved compact manner on the base, thereby resulting in an apparatus which is extremely well balanced, compact and readily portable from one working place to another.

These and other uses and advantages of the im- 65 proved drilling apparatus will be clearly apparent to those skilled in the art.

While I I have in this application specifically described one form which the invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a drilling apparatus, a base, a drilling tool, and adjustable supporting means on said base for said drilling tool including a swingable arm pivoted on an axis extending longitudinally of said base midway between the sides of said base and means for adjustably mounting said drilling tool on said arm, said arm being swingable about said axis and said mounting means adjustable relative to said arm to adjust said drilling. tool into any desired horizontal drilling position between a bottom drilling position and a top drilling position and any desired vertical drilling position between the sides of said base.

2. In a drilling apparatus, a base, adjustable supporting means mounted on said base including an arm mounted to swing in transverse planes about a horizontal axis, and a swivelled drill head pivotally mounted on the outer extremity of said arm, said arm being swingable about said horizontal axis while the latter remains fixed with respect to said base and the drill head pivot always remains parallel to a common straight line to adjust said drill head into drilling positions at either side of said base.

3. In a drilling apparatus, a base, an arm mounted on said base to swing about a horizontal axis extending longitudinally of said base, and a swiveled drill head mounted on the outer extremity of said arm for swinging movement about a parallel axis, said arm being swingable about said horizontal axis while the latter remains fixed to position the drill head in drilling positions at either side of said base and said drill head being swingable about said parallel axis in any position of said arm.

4. In a drilling apparatus, a base, an arm mounted on said base to swing in transverse planes relative thereto about a horizontal axis, a swiveled drill head mounted on said arm for swinging movement relative thereto about a parallel axis, and drill feeding mechanism carried by said swiveled drill head, said arm being swingable about said horizontal axis while the latter remains fixed to position said drill head in drilling positions at either side of said base and said drill head being swingable about said parallel axis in any position of said arm.

5. In a drilling apparatus, a base, a drilling tool, an adjustable supporting structure on said base for said drilling tool for adjusting the latter in transverse vertical planes relative to said base into any desired lateral drilling position across said base from one side of the latter. to the other while said drilling tool always remains in aforesaid transverse vertical planes, a motor on said base relative to which said supporting structure is adjustable, and mechanism driven by said motor for rotating said drilling tool.

6. In a drilling apparatus, a base, a drilling tool, an adjustable supporting structure on said base for said drilling tool for adjusting the latter in transverse vertical planes relative to said ba'se into any desired lateral drilling position across said base from one side of the latter to the other while said drilling tool always remains in aforesaid transverse vertical planes, a motor on said base relative to which said supporting structure is adjustable, and mechanism driven by said motor for rotating said drilling tool irrespective of the adjusted position of said supporting structure relative to said base.

'7. In a drilling apparatus, .a. base, a motor on said base having its power shaft horizontally and longitudinally disposed, drill rotation mechanism driven from one end of said motor, drill feeding mechanism, a fluid compressor driven from the same end of said motor for supplying fluid under pressure to said feeding mechanism, and mech- 5 anism driven from the opposite end of said motor for propelling said base.

8. In a drilling apparatus, a base, an elongated arm mounted on said base to swing in transverse vertical planes relative to said base about a horizontal axis, mechanism for swinging said arm and for holding said arm in its difierent angular positions about said horizontal axis relative to said base, a drilling mechanism, and means for mounting said drilling mechanism on the outer extremity of said arm, said arm being swingable about said horizontal axis and said mounting means adjustable relative to said arm to move the drill mechanism across said base from one side thereof to the other into positions to drill 20 holes in any desired location between the sides of said base in planes parallel to the planes of swinging movement of said arm.

9. In a drilling apparatus, a base, an arm mounted on said base to swing from one side thereof to the other in transverse planes relative thereto about a horizontal axis located midway between the sides of said base, mechanism for swinging said arm about said axis and for holding said arm in its difierent angular positions relative to said base, and a drill feeding mechanism mounted on the outer extremity of said arm to swing relative to said arm about a parallel axis.

10. In a drilling apparatus, a base, an elongated arm mounted on said baseto swing relative thereto about an axis extending longitudinally of said base, a drilling mechanism, and means for mounting said drilling mechanism on the outer extremity of said arm, said arm being swingable about said longitudinal axis and said mounting means adjustable relative to said arm to move said drilling mechanism across said base into positions to drill holes at any desired location between the sides of said base and at either side 45 of said base in planes parallel to the planes of swinging movement of said arm.

11. In a drilling apparatus, a base, an arm mounted on said base to swing relative thereto, and a drilling mechanism swivelly mounted to swing about a longitudinal axis on the outer extremity of said arm,.said arm being swingable relative to said base to position the drilling mechanism in drilling position at either side of said base while said longitudinal axis always remains parallel to a common straight line.

12. In a drilling apparatus, a base, an arm mounted on said base to swing in transverse planes relative thereto, and a drilling mechanism swivelly mounted on the outer extremity of said 60 arm about an axis parallel to the arm pivot axis, said arm being swingable about its pivotal axis relative to said base to position the drilling mechanism in drilling position at either side of said base while said parallel'axis always remains parallel to a. common straight line.

13. In a drilling apparatus, a base, a drilling tool, adjustable supporting means on said base for adjusting the tool about a longitudinal axis into diflerent lateral positions relative to said base, fluid operated feeding means for the drilling tool, and a fluid pump on said base and relative to which the tool is adjustable for supplying fluid under pressure to said feeding means.

14. In adrilling apparatus, a portable base, an

arm pivotally mounted on said base at one end thereof to swing relative thereto about an axis extending longitudinally of said base, said arm being swingable about said axis into horizontal positions wherein the outer extremity thereof extends laterally from the sides of the base, and a drilling tool carried on the outer extremity of said arm, said arm being swingable'as aforesaid about said longitudinal axis to move said drilling tool into any desired position between the sides of said base to drill a series of parallel vertical holes between the sides of said base.

15. In a drilling apparatus, a portable base, an arm pivotally mounted on said base at one end thereof to swing relative thereto about an axis extending longitudinally of said base, said arm b'eing swingable about said axis into horizontal .positions wherein the outer extremity thereof ex-f tends laterally from the sides of the base, and a drilling tool swivelly mounted on the outer extremity of said arm, said arm being swingable as aforesaid about said longitudinal axis to adjust the drilling tool into parallel vertical drilling positions while said tool swivel axis always remains parallel to a common straight line, and said tool being swingable about its swivel axis relative to said arm in any position of said arm.

16. In a drilling apparatus, a portable base, an

arm pivotally mounted onsaid base at one end thereof to swing relative thereto about a longitudinal axis, said arm being swingable about saidaxis into horizontal positions wherein the outer extremity thereof extends laterally from the sides of the base, and a drilling tool swiveled on the outer extremity of said arm to swing about an axis parallel with the arm pivot axis, said arm being swingable as'aforesaid about said longitudinal axis to position the drilling tool into parallel vertical drilling positions and said tool being swingable about its parallel axis in any position of said arm.

17. In a drilling apparatus, a portable base, a swiveled drill head rotatable about a longitudinal axis, an adjustable supporting structure on said base on which said drill head is swivelly mounted for adjusting the drill head in transverse planes bodily into diflerent elevations relative to the base. said drill head being swingable about its swivel axis into positions to drill holes at either side of said base in any of the aforesaid elevated positions.

18. In a drilling apparatus, a portable base, a

horizontal motor on said base having its power shaft extending longitudinally of said base, a drilling tool mounted on said base at one end thereof and including drill feeding and rotation mechanisms, a fluid compressor mounted on the opposite end of said base for supplying fluid under pressure to the drill feeding mechanism, driving connections between said fluid compressor and the adjacent end of said motor, and driving connections between the end of said motor remote I from said drilling tool and the'drill rotation mechanism,

19. In a drilling apparatus, a portable base, a horizontal motor on said base having its power shaft extending longitudinally of said base, a drilling tool mounted on said base at one end thereofand including drill feeding and rotation mechanisms, a fluid compressor mounted on the opposite end of said base for supplying fluid under pressure to the drill feeding mechanism, driving connections between said fluid compressor and the adjacent end'of said motor, driving connections between the same end of said motor and horizontal motor on said "base having its power shaft extending longitudinally of .said base, a

drilling tool mounted on said base at one end thereof and including drill feeding and rotation mechanisms, a fluid compressor mounted on the opposite end of said base for supplying fluid under pressure to the drill feeding mechanism, a drill hoisting mechanism mounted on said base between said fluid compressor and said drilling tool, driving connections between said fluid compressor and the adjacent end of said motor, and driving connections between the end of said motor remote from saiddrilling tool and the drill rotation mechanism and said hoisting mechanism.

21. In a drilling apparatus, a portable base, a horizontal motor on said base having its power shaft extending longitudinally of said base, a drilling tool mounted on said base at one end thereof and including drill feeding and rotation mechanisms, a fluid compressor mounted on the opposite end of said base for supplying fluid under pressure to the drill feeding mechanism, a

drill hoisting mechanism mounted on said base between said fluid compressor and said drilling tool, driving connections between said fluid compressor and the adjacent end of said motor, driving connections between the same end of said motor and the drill rotation mechanism and said hoisting mechanism, and mechanism driven from the opposite end of said motor for propelling the base.

22. In a drilling apparatus, a portable base, a drilling tool swiveled to swing about a longitudinal axis and including drill rotation mechanism, an adjustable supporting structure for the drilling tool and including supporting means mounted to swing about a horizontal axis on said base for bodily adjusting the drilling tool into diflerent elevated positions with its swivel axis in different horizontal planes, said drilling tool being swingable about its swivel axis in any of aforesaid elevated positions relative to said supporting structure into positions to drill holes at either side of said base, a motor on said base relative to which the drilling tool is adjustable, and means driven by said motor for driving the drill rotation mechanism in any adjusted position of said drilling tool. i

23. In-a drilling apparatus, a portable base, a drilling tool mounted on said base to swivel about an axis extending longitudinally of said base, and

an adjustable supporting structure for said drilling tool and including supporting means mounted to swing about a horizontal longitudinal ,axis on said base with respect to the latter for bodily adjusting said swivel axis into different elevated positions relative to said base to position the drilling tool to drill holes in advance of the base ,in planes above and below a horizontal plane including said supporting means axis.

24. In a drilling apparatus, a portable base; a

porting means mounted to swing about a horizondrilling tool mounted on said base to swivel about tal axis onsaid base for bodily adjusting the swivel axis; of the tool into diiferent elevated positions relative to the said base while said swivel axis always remains parallel to a common straight line during such adjustment, said drilling tool being adjustable as aforesaid to drill holes in planes above and below a horizontal plane including said supporting means axis and in advance of said base in such planes.

25. In a drilling apparatus, a portable base, a.

drilling tool mounted on said base to swing about an axis extending longitudinally of said base, and an adjustable supporting structure for said drilling tool for bodily adjusting the axis of swing of the latter into different elevations and laterally relative to said base at either side of said base while said drilling tool is maintained against bodily movement in a direction longitudinally of said base.

26. In a drilling apparatus, a portable base, a

drilling tool mounted on said base to swing about a longitudinal axis, and an adjustable supporting structure for the drilling tool for bodily adjusting the axis of the latter into difierent elevated positions and laterally relative. to the said base at either side of said base with its swivel axis always parallel to a common straight line during such adjustment.

27. In a drilling apparatus, a portable base, a motor on said base, a drilling tool, adjustable supporting means on said base for said drilling tool and on which the tool is adjustably mounted, said supporting means including a hollow arm swingably mounted upon the base and on the outer extremity of which said drilling tool is swivelly mounted, said arm being swingable in transverse vertical planes with respect to said base to adjust said drilling tool into drilling positions at either side of said base while said arm is maintained in said transverse vertical planes and while the swivel axis of said tool always remains parallel to a common straight line, and driving connections between said motor and said drilling tool including transmission means housed within said arm.

28. In a drilling apparatus, a portable base,

I a motor on said base, a drilling tool, adjustable supporting means on said base for said drilling tool and on which the tool is adjustablymounted, said supporting means including a hollow arm swingably mounted upon the base and on the outer extremity of which said drilling tool is swivelly mounted, said arm being swingable in transverse vertical planes with respect to said base and motor to adjust said drilling tool into drilling positions at either side of said base while said arm is maintained in said transverse vertical plane and while the swivel axis of said tool remains always parallel to a common strai ht line, and driving connections between .said motor and said drilling tool including a transmission element alined with the arm pivot axis, a transmission element alined with the drill swivel axis, and

connections between said transmission elements housed in said arm.

29. In a drilling apparatus, a portable base, a motor on said base, a swivel drill head, an adjustable supporting structure for said drill head and on which said drill head is swiveled on an axis extending longitudinally of said base, said supporting structure including supporting means swingable about a horizontal axis on said base through at least 180 adjustable to position the drill head into different elevated positions relative to the base and said motor including drilling positions in planes above and below a horizontal plane including the horizontal axis of said supporting means, and driving connections between said motor and said drill head operative irrespective of the adjusted position of the drill head.

30. In a drilling apparatus, a portable base, a motor on said base, a swivel drill head, an adjustable supporting structure for said drill head and on which said drill head is swiveled on an axis extending longitudinally of said base, said supporting structure being adjustable to position the drill head into difierent elevated positions relative to the base and said motor including drilling positions in planes above and below a horizontal plane including the horizontal axis of 1 said supporting means, and driving connections between said motor and said drill head operative irrespective of the adjusted position of the drill head and including a longitudinally extending shaft driven by said motor, a parallel shaft alined with the drill head swivel axis, and adjustable connections between said shafts.

31. In a drilling apparatus, a portable base, a motor on said base, a. swivel drill head, an adjustable supporting structure for said drill head 2 and on which said drill head is swiveled on an axis extending longitudinally of said base, said supporting structure being adjustable to position the drill head into different elevated positions relative to the base and said motor, and driving 2 connections between said motor and said drill head operative irrespective of the adjusted posi tion of the drill head and including a longitudinally extending shaft arranged along one side of the base and driven by said motor, a parallel 3 shaft driven by said first shaft, a shaft driven by said parallel shaft and alined with the drill head swivel axis, and adjustable driving connections between said last two mentioned shafts.

32. In a drilling apparatus, a portable base, a 3 motor on said base, a swivel drill head, an adjustable supporting structure for said drill head and on which said drill head is swiveled on an axis extending longitudinally of said base, said supporting structure being adjustable to position the drill head into different elevated positions relatlve to the base and said motor, and driving connections between said motor and said drill head operative irrespective of the adjusted position of the drill head and including a longitudinally ex- 45 tending shaft arranged along one side of the base and driven by said motor, a parallel shaft, a third shaft, a fourth shaft alined with the swivel head axis, and adjustable driving connections between said third and fourth mentioned shaft-s.

33. In-a drilling apparatus, a portablebase, a motor on said base, a swivel drill head, an adjustable supporting structure for said drill head and on which said drill head is swiveled on an axis extending longitudinally of said base, said supporting structure being adjustable to position the drill head into different elevated positions relative to the base and said motor, and driving connections between said motor and said drill C head operative irrespective of the adjusted position of the drill head and including a longitudinally extending shaft arranged along one side of the base and driven by said motor, a parallel shaft, a third shaft, a fourth shaft alined with C the swivel head axis, and adjustable driving connections between said third and fourth mentioned shafts and a change speed mechanism be-' tween said second and third mentioned shafts.

34. In a' drilling apparatus, a base, a boring tool, and adjustable supporting means on said base for said boring tool for adjusting the latter relative to the base into any desired vertical boring position between the sides of said base and into any desired horizontal boring position 7 between a low horizontal boring position and a high horizontal boring position, the longitudinal axis of the boring tool in all the aforesaid boring positions lying in a common vertical plane extending transversely of said base, and a motor mounted on said base and relative to which said boring tool is adjustable for driving said boring tool irrespective of its adjusted position.

35. In a drilling apparatus, a portable base, drill rod rotation and feeding mechanism swiveled on said base about an axis extending longitudinally of said base. mechanism including supporting means adjustable about a horizontal axis on said base through more than 180 for adjusting the elevation of said swivel axis relative to said base to position said mechanism to drill holes in planes above and below the horizontal plane including the horizontal axis of said supporting means, and mechanism on said base for driving said drill rod rotation mechanism irrespective of the adjusted position of said swivel axis relative to said base.

36. In a. drilling apparatus, a portable base, drill rod rotation and feeding mechanism swiveled on said base about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said swivel axis relative to said base operative to position the drill at opposite sides of the longitudinal center of the base while the longitudinal axis of said mechanism at all times lies in a common vertical plane extending transversely of said base, said adjusting mechanism being adjustable as aforesaid to-position the drill mechanism to drill parallel horizontal holes and parallel vertical holes, and'mechanism on said base for driving said drill rod rotation mechanism irrespective of the adjusted position of said swivel axis relative to said base.-

37. In a drilling apparatus, a portable base,

- drill rod rotation and feeding mechanism swiveled on said base about an axis extending longitudinally of said base, mechanism for adjusting the elevation of said swivel axis relative to said base to position the drill mechanism to drill holes between a position near the ground surface and a position a substantial distance above said base, mechanism on said base for driving said drill rod rotation mechanism irrespective of the adjusted position of said swivel axisrelative to said base, and mechanism on said base and relative to whichthe swivel axis of said drill rod rotation and feeding mechanism is adjustable for operating said feeding mechanism.

38. In a drilling apparatus, a portable base, drill rod rotation and feeding mechanism swiveled on said base about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said swivel axis relative to said base to position said drill mechanism to drill holes between a position near the ground surface and a position a substantial distance above said base and at, either side of said base, mechanism on said base for driving said drill rod rotation mechanism irrespective of the adjusted position of said swivel axis relative to said base, and mechanism on said base and relative to which the swivel axis of said .drill rod rotation and feeding mechanism is adjustable for operating said feeding mechanism.

39. In a drilling apparatus, a portable base, drill rod rotation and feeding mechanism swiveled on said base about an axis extending longitudinally of said base, mechanism including supporting means adjustable about a horizontal axis on said base through at least for adjusting the elevation of said swivel axis relative to said base while said swivel axis always remains parallel to a common straight line extendirig longitudinally of theapparatus, said supporting means being adjustable as aforesaid to position the drill mechanism to drill holes between a position near the ground surface and a position a substantial distance above said base, and mechanism on said base for driving said drill rod rotation mechanism irrespective of the .ad-

justed position of said swivel axis relative to said base.

40. In a drilling apparatus, a portable base, drill rod rotation and feeding mechanism swiveled on said base about an axis extending longitudinally of said base, supporting means including mechanism for adjusting the elevation and lateral position of said swivel axis relative to said base while said swivel axis always remains parallel to a common straight line extending longitudinally of the apparatus, said supporting means being adjustable as aforesaid to position the drill mechanism to drill holes between a position near the ground surface and a position a substantial distance above said base and at either side of said base, and mechanism on said base for driving said drill rod rotation mechanism irrespective of the adjusted position of said swivel axis relative to said base.

41. In a drilling apparatus, a portable base, a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism including supporting means swingable relative to said base for adjusting said frame into different elevated positions relative to said base in advance of the latter while maintaining said longitudinally extending axis continuously parallel to a common straight line, and drill rod rotation and feeding mechanisms mounted on said rotatable frame, said supporting means being adjustable as aforesaid to position the drill mechanism to drill holes in planes above and below a horizontal plane including the supporting means axis.

42. In a drilling apparatus, a portable base,'

a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said frame relative to said base while said frame is maintained against bodily movement in a direction longitudinally of said base, and drill rod rotation and feeding mechanisms mounted on said rotatable frame, said adjusting mechanism being adjustable as aforesaid to position the drill mechanism to drill parallel horizontal holes and parallel vertical holes at either side of said base.

43. In a drilling apparatus, a portable base, a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism including supporting means swingable relative to said base for adjusting said frame into different elevated positions relative to said base and having a range of adjustment in excess of 180, drill rod rotation and feeding mechanisms mounted on said rotatable frame, said supporting means being adjustable as aforesaid to position the drill mechanism to drill holes in positions between a position near the ground surface and aposition a substantial distance above said base, and a motor on said base for driving said rotation mechanism irrespective of the adjusted position of said frame relative to said base.

44. In a drilling apparatus, a portable base,

a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said frame relative to said base while said frame is maintained against bodily movement in a direction longitudinally of said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame, said adjusting mechanism being adjustable as aforesaid to position the drill mechanism to drill parallel horizontal holes and parallel vertical holes at either side of said base, and a motor on said base for driving said rotation mechanism irrespective of the adjusted position of said frame relative to said base.

45. In a drilling apparatus, a portable base, a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism including supporting means swingable relative to said base for adjusting said frame into different elevated positions relative to said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame, said supporting means being adjustable as aforesaid to position the drill mechanism to drill holes in a position near the ground surface and in a position a substantial distance above said base and in intermediate positions in advance of said base, and a motor on said base for driving said rotation mechanism and for operating said feeding mechanism irrespective of the adjusted position of said frame relative to said base.

46. In a drilling apparatus, a portable base, a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said frame relative to said base while said frame is maintained against bodily movement in a direction longitudinally of said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame, said adjusting mechanism being adjustable as aforesaid to position the drill mechanism to drill parallel horizontal holes and parallel vertical holes at either side of said base, and a motor on said base for driving said rotation mechanism and for operating said feeding mechanism irrespective of the adjusted position of said frame relative to said base.

4'7. In a. drilling apparatus, a portable base, a swiveled drill. head carrying a boring tool and including feeding and rotating means for the tool, and an adjustable supporting structure for said drill head for adjusting the boring tool, while the latter is maintained against bodily movement in a direction longitudinally of said base, into parallel vertical boring positions, including a position between the sides of the base,

and into parallel horizontal boring positions, said drill head swiveled about an axis extending longitudinally of the apparatus.

48. In a drilling apparatus, a portable base, a drill head swiveled for rotation about a longitudinal axis, an adjustable supporting structure of said drill head for adjusting said head into different elevated positions relative to said base, a drilling tool carried by said drill head, drill rotation mechanism carried by said drill head for rotating the drilling tool, pressure fluid operated feeding means carried by said drill head for feeding the drilling tool during rotation thereof, a pump carried by said base for supplying fluid under pressure to said feeding means, a, motor on said base for operating said pump, said drill head adjustable into aforesaid elevated positions relative to said motor and pump, and adjustable connections driven by said motor for driving said rotating mechanism, said pump being operative to supply fluid under pressure to said feeding means and said connec- 5 tions operative to drive said rotation mechanism irrespective of the elevated position of the drill head relative to said base.

49. In a drilling apparatus, a portable base, an arm pivotally mounted on said base at one end 10 and midway between the sides thereof to swing relative thereto in transverse vertical planes in advance of said base about an axis extending longitudinally of said base, said arm being swingable about said axis into horizontal positions 15 wherein the outer extremity thereof extends laterally from either side of the base, and a drilling tool carried at the outer extremity of said arm and adjustable with said arm in any desired drilling position between drilling positions be- 20 yond the sides of said base when said arm is in aforesaid horizontal positions.

50. In a drilling apparatus, a portable base, an arm pivotally mounted on said base at one end and midway between the sides thereof to swing 25 relative thereto in transverse planes in advance of said base about an axis extending longitudinally of said base, said arm being swingable about said axis into horizontal positions whereinthe outer extremity thereof extends laterally 30 from either side of the base, and a drilling tool swivelly mounted on the outer extremity of said arm, the swivel axis of said drilling tool in any position of said arm about said longitudinal axis remaining always parallel to a common straight 35 line.

51. In a drilling apparatus, a portable base, an arm pivotally mounted on said base at one end and midway between the sides thereof. to swing relative thereto in transverse planes in advance of said base about a longitudinal axis, said arm being swingable about said axis into horizontal positions wherein the outer extremity thereof extends laterally from either side of the base, and a drilling tool swiveled on the outer extremity 45 of said arm to swing about an axis parallel with the arm axis.

52. In a drilling apparatus, a portable base, a frame rotatable about a longitudinal axis, an adjustable supporting structure on said base for adjusting said frame into different elevated positions relative to the base, a support hinged on said rotatable frame to swing relative thereto, and a drilling tool mounted on said hinged frame.

53. In a drilling apparatus, a portable base, a drilling tool, and adjustable supporting-means on said base for supporting said drilling tool for adjustment-in vertical planes extending transversely of said base into parallel vertical drilling positions, including a position between the sides 60 of the base, and parallel horizontal drilling positions, said supporting means including a swiveled frame rotatable about a horizontal axis extending longitudinally of said base for supporting said tool for adjustment into aforesaid 65 horizontal and vertical drilling positions and said supporting means being adjustable about an axis distinct from aforesaid axis and extending longitudinally of said base to adjust said tool in aforesaid parallel positions.

54. In a drilling apparatus, a base, a boring tool swivelly mounted on said base on an axis extending longitudinally of said base, and adjustable supporting means for said boring tool for adjusting the swivel axis of the latter verti- 75 oally relative to the base to position said boring tool inparallel horizontal boring positions for drilling in advance of said base, said supporting means being adjustable to move the swivel axis of said boring tool to position said boring tool through a relatively wide range of such adjustments including a relatively low horizontal boring position adjacent the ground surface.

55. In a drilling apparatus, a base, a boring tool, and adjustable supporting means for said boring tool for adjusting the latter vertically relative to the base into parallel horizontal boring positions for drilling in advance of said base, said supportim means being adjustable to position said boring tool through a relatively wide range of adjustments relative to said base in any desired horizontal boring position between :a relatively low horizontal bottom boring position adjacent the ground surface and a relatively high horizontal top boring position a substantial distance above said base, and a motor on said base and relative to which said boring tool is adjustable for driving said boring tool in any of aforesaid adjusted positions.

56. In a drilling apparatus, a portable base, a frame mounted on said base for rotation of more than 180 about an axis extending longitudinally of said base, mechanism for adjusting said frame into different elevated positions relative to said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame and adjustable with the latter as aforesaid into parallel horizontal drilling positions and parallel vertical drilling positions, and a motor on said base for driving said rotation mechanism irrespective of the adjusted position of said frame relative to said base. 1

57. In a drilling apparatus, a portable base, a frame mounted on said base for rotation of more than about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said framerelative to said base, said frame being adjustable by said mechanism across the end of said base from one side thereof to the other while said axis always extends longitudinally of said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame, and a motor on said base for driving said rotation mechanism irrespective of the adjusted position of said frame relative to said base.

58. In a drilling apparatus, a portable base, a frame mounted on said base for rotation of more than 180 about an axis extending longitudinally of said base, mechanism for adjusting said frame into diiferent elevated positions relative to said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame, and adjustable with the latter as aforesaid into parallel horizontal drilling positions and parallel vertical drilling positions, and a motor on said base for driving said rotation mechanism and for operating said feeding mechanism irrespective of the adjusted position of said frame relative to said base.

59. In a drilling apparatus, a portable base, a frame mounted on said base for rotation about an axis extending longitudinally of said base, mechanism for adjusting the elevation and lateral position of said frame relative to said base, said frame being adjustable by said mechanism across the end of said base from one side thereof to the other while said axis always extends longitudinally of said base, drill rod rotation and feeding mechanisms mounted on said rotatable frame, and a motor on said base for driving said rotation mechanism and for operating said feeding mechanism irrespective of the adjusted position of said frame relative to said base.

60. In a drilling apparatus, a base, a drilling tool, and adjustable supporting means on said base for said drilling tool for supporting the latter in advance of said base, said supporting means embodying means for adjusting said drilling tool relative to said base through a series of parallel drilling positions, and means distinct from said adjusting means for adjusting said drilling tool into different angular positions relative to said base, the longitudinal axis of said drilling tool in all of aforesaid positions lying in a common vertical plane extending transversely of said base, and a motor mounted on said base and relative to which said drilling tool is adjustable for driv-' ing said drilling tool irrespective of its adjusted position.

HARRY C. JOHANSEN. 

